US9003939B2 - Rotary cutting apparatus with vibration attenuation means - Google Patents

Rotary cutting apparatus with vibration attenuation means Download PDF

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Publication number
US9003939B2
US9003939B2 US13/431,181 US201213431181A US9003939B2 US 9003939 B2 US9003939 B2 US 9003939B2 US 201213431181 A US201213431181 A US 201213431181A US 9003939 B2 US9003939 B2 US 9003939B2
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Prior art keywords
shaft
rotary
housing
drum
cutting apparatus
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US20120255412A1 (en
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Pierre-Luc Dijon
Arnaud Pras
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Hyperion Materials and Technologies Sweden AB
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Sandvik Intellectual Property AB
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B26D1/405—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/14—Forming notches in marginal portion of work by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B26D7/265—Journals, bearings or supports for positioning rollers or cylinders relatively to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B26F1/42—Cutting-out; Stamping-out using a press, e.g. of the ram type having a pressure roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/10—Making cuts of other than simple rectilinear form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4833—Cooperating tool axes adjustable relative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8748—Tool displaceable to inactive position [e.g., for work loading]
    • Y10T83/8749—By pivotal motion

Definitions

  • the present invention relates to a rotary cutting apparatus, comprising
  • a rotary cutting apparatus is known from EP-A-1 710 058.
  • the known rotary cutting apparatus however suffers from the drawback that it is not adapted for high speed cutting.
  • EP-A-1 721 712 discloses a rotary cutting apparatus provided with a controllable lifting device for actively lifting the anvil in response to a sensor for sensing protection of the anvil and the cutter against foreign bodies.
  • EP-A-1 612 010 discloses an anvil drum and the cutter drum for a rotary cutting apparatus, the anvil drum and/or the cutter drum being divided into a peripheral sleeve and and an intermediate sleeve, the material of the latter being chosen depending on the desired properties, such as vibration damping, thermal insulation, thermal conduction, weight reduction or weight increase.
  • WO 03/093696 discloses a mass damper for a machine tool intended for turning or milling.
  • An object of the present invention is to improve the stability of the first and the second rotary devices of the rotary cutting apparatus, such that can be used for higher speeds.
  • a rotary cutting apparatus as initially defined, wherein means is provided for passive vibration attenuation of at least said first shaft, said means for passive vibration attenuation comprising a mass damper having a housing and a damping body movably arranged inside said housing, wherein said mass damper is associated with said first pair of bearing housings.
  • the web is uneven in its contents and structure and thus causes a more or less continuous vibration.
  • the web may contain large debris of a size larger than that of the thickness of the web, or undesired items like tools may fall onto the web. Either of them may cause an impact, in turn causing a sudden movement of the first shaft, resulting in a transient in the vibration pattern. Consequently, a possibility of quickly damping strong transients, due to impacts by e.g. foreign objects on or inside the web is achieved by means of said mass damper.
  • said housing has the shape of an elongated cylinder with circular cross-section, said housing being provided with a rod or a tubing, said rod or tubing being concentrically arranged inside said housing by means of at least one bushing.
  • said bushing connects the rod or tubing to said housing in such a way that a space is created between said rod or tubing and housing, the space comprising said damping body.
  • said damping body comprises a plastic material and/or a metallic material.
  • said damping body is substantially prevented from moving in an axial direction inside said housing, and wherein said damping body is allowed to move in a radial direction in relation to said rod or tubing inside the housing.
  • said housing comprises a fluid, such as a liquid or a gas.
  • said fluid is one of or a combination of air, water, oil and grease.
  • said elongated housing is arranged parallel to said first rotational axis.
  • said elongated housing is arranged transversely to said first rotational axis.
  • one housing is arranged on either sides of said first drum.
  • said first rotary device comprises a rotary anvil and said second rotary device comprises a rotary cutter.
  • FIG. 1A is a front perspective view of a rotary cutting apparatus according to a first embodiment of the invention having cutter drum and an anvil drum.
  • FIG. 1B is a front perspective view of the rotary cutting apparatus shown in FIG. 1A , including a mass damper, parts of the frame being omitted.
  • FIG. 1C is a rear perspective view of the rotary cutting apparatus shown in FIG. 1A , parts of the frame being omitted.
  • FIG. 2 is a front perspective view of a rotary cutting apparatus according to an alternative aspect of the invention including a mass damper.
  • FIG. 3 is a front perspective view of a rotary cutting apparatus according to a further aspect of the invention.
  • FIG. 4 is an anvil drum as shown in FIGS. 1A-1C and FIGS. 2-3 , partly with details omitted, partly in cross-section.
  • FIG. 5 is a front perspective view of a rotary cutting apparatus according to a further aspect of the invention.
  • FIGS. 6 a and 6 b is a schematic view of a web cut to articles by the cutting apparatus shown in FIGS. 1 to 5 .
  • FIG. 7 illustrates schematically the principle of the mass damper shown in FIGS. 1B and 2 .
  • FIGS. 1A-1C show a rotary cutting apparatus 2 comprising a frame 4 adapted to be attached to a not-shown basement.
  • a rotary cutter 6 and a rotary anvil 8 are arranged in the frame 4 .
  • FIG. 1A the rotary cutter 6 and the rotary anvil 8 are shown in a cutting relationship, whereas in FIG. 1B and FIG. 1D , they are shown in a separated relationship.
  • the rotary cutter 6 is provided with an elongated cutter shaft 10 and a cutter drum 12 , the cutter drum 12 being coaxially arranged on the cutter shaft 10 about a rotation axis A-A.
  • the shaft has an axial extension on each side of the cutter drum 12 , where a cutter bearing housing 14 is provided, respectively.
  • the cutter bearing housings 14 are each connected to the frame 4 by means of a fastening element 16 , such as a screw.
  • the cutter shaft 10 is preferably made of steel and is adapted to connected to a not shown rotatable power source.
  • the cutter drum 12 is provided with a pair of annular support rings 17 and a pair of annular cutter sleeves 18 a , 18 b each provided with cutting members 20 for cutting articles from a web (see FIG. 6 .).
  • the support rings 17 may be separate parts. Alternatively, one of the support rings may be an integrated part of the cutter sleeve 18 a and the other support ring an integrated part of the other cutter sleeve 18 b.
  • An intermediate annular sleeve 22 without cutting edges is provided between the annular cutter regions 18 a , 18 b , the intermediate sleeve 22 and the cutter sleeve 18 a , 18 b being coaxially arranged in relation to the axis A-A.
  • the support rings 17 , the annular cutting sleeves 18 a , 18 b and the intermediate annular sleeve 22 may be made of one single piece, forming a an integrated annular sleeve, the axial extension of which corresponding to that of the cutter drum 12 .
  • the support rings 17 , the annular cutter sleeves 18 a , 18 b and/or the intermediate piece may be made of steel, but are preferably made of a cemented carbide. They are press-fit onto a portion of the cutter shaft 10 having an enlarged diameter, altogether constituting said cutter drum 12 .
  • the rotary anvil 8 is provided with an elongated anvil shaft 24 and an anvil drum 26 , the anvil drum 26 being coaxially arranged on the anvil shaft 24 about a rotation axis B-B.
  • the anvil drum 26 comprises a pair of support rings 27 and three coaxially arranged annular anvil sleeves 28 a , 28 b , 28 c , each having a rotational symmetrical anvil surface 29 , coaxial to the axis B-B.
  • the support rings 27 may be separate parts. Alternatively, one of the support rings may be an integrated part of the peripheral anvil sleeve 28 a and the other support ring an integrated part of the other peripheral anvil sleeve 28 c.
  • the peripheral anvil sleeves 28 a , 28 c are arranged on either sides of the anvil sleeve 28 b. Together, they are coaxially arranged in relation to the rotational axis B-B and are preferably made of steel.
  • the peripheral sleeves 28 a , 28 c , the intermediate sleeve 28 b and the support rings 27 are made as a single piece, forming an integrated annular sleeve, the axial extension of which corresponding to that of the cutter drum anvil drum 26 .
  • the support rings 27 are adapted to bear against the support rings 17 of the cutter drum during the cutting operation.
  • the anvil shaft 24 is arranged vertically above the cutter shaft 10 in such a way that the axis B-B is parallel to and is in the same vertical plane as the axis A-A.
  • An anvil bearing housing 30 is arranged on either sides of the anvil drum 26 and connected to an intermediate piece 32 (best shown in FIG. 1B ).
  • the intermediate piece 32 is in sliding relationship with a pair of C-shaped parts 34 of the frame 4 , having an upper shank 34 a , a lower shank 34 b and an interconnecting portion 34 c , via four guide members 36 .
  • the C-shaped part 34 is provided with an opening 37 for allowing access to the anvil bearing housing 30 , two of the guide members 36 being arranged between the upper and lower shanks 34 a , 34 b and on opposite sides of one of the anvil bearing housings 30 , while two further guide members are arranged between the upper and lower shanks 34 a , 34 b and on opposite sides of the other anvil bearing housing 30 .
  • a pair of pneumatic cylinders 38 are each provided with a piston 40 (best shown in FIG. 1C ) and a hose 42 for connection to a not shown pneumatic source.
  • the piston will press the intermediate piece 32 including the anvil bearing housings 30 and thus also the anvil support ring 27 as well as the surface of the annular anvil rings 28 a , 28 c towards and against the support rings 17 and the cutting members 20 of the cutter drum, respectively.
  • a helical spring 44 is provided about each guide member 36 and acting on the intermediate piece 32 and the 34 b lower shank of the C-shaped part 34 .
  • the anvil drum 26 is prevented from colliding with the cutter drum 12 when applying pressure by means of the pneumatic cylinders or after passage of a foreign body, in turn avoiding damages of the knife member 20 and/or the anvil surface 29 .
  • the springs 44 also counter-balance the weight of the rotary anvil 8 , such that a minimum pressure is required for the anvil surface 29 to come into contact with the cutting members 20 during use.
  • a passive damper 46 in the form of a mass damper 47 comprising an elongated cylinder 48 is arranged parallel to the rotational axis B-B of the anvil drum 26 .
  • the cylinder 48 is connected to the intermediate pieces 32 by brackets 49 , respectively.
  • the elongated cylinder 48 comprises a movable damping body 50 , tunable to a predetermined frequency range.
  • PU polyurethane
  • Each elastomeric member is are arranged about one of the helical springs 44 and thus also about one of the guide members 36 , as can be understood by the cross-section-in-part of FIG. 1B .
  • the elastomeric members 52 also adds to the stiffness of the rotary cutting apparatus 2 , adding to the stability of thereof.
  • the elastomeric members 52 will isolate the anvil drum 26 from the vibrations transferred via the frame from the web or the source of power.
  • FIG. 1A shows how the rotary cutter 6 and the rotary anvil 8 come into a cutting relationship by allowing the pneumatic cylinders 38 to press against an upper contact surface 54 of the intermediate piece and in turn on the rotary anvil.
  • FIGS. 1B and 1C the pneumatic cylinders 38 have been de-activated, such that no pressure is any longer exerted by them downwardly on the intermediate pieces 32 . Instead, the springs 44 exert a pressure upwardly on the lower shank 34 b of the C-shaped portion 34 and on a lower contact surface 56 of the intermediate piece 32 . The springs 44 will thus cause the rotary anvil 8 to move vertically upwards and away from the rotary cutter 6 to the above mentioned non-cutting, in this case lifted position.
  • the elastomeric members 52 When the anvil drum 26 is in a cutting relationship with the cutter drum 12 , the elastomeric members 52 (see FIG. 1B ) will each contact the lower shank 34 b of the C-shaped parts 34 as well as the lower contact surface 56 of the intermediate piece 32 . However, when the pneumatic cylinders 38 are inactivated, the springs 44 will press the intermediate piece 32 vertically upwards such that the upper contact surface 54 of the intermediate piece 32 will rest against the upper shank 34 a of the C-shaped part 34 . There will be a free space between the elastomeric member 52 and the lower contact surface 56 of the intermediate piece, since the elastomeric member 52 has a shorter axial extension than the spring 44 .
  • the intermediate piece 32 is made of a light material, such as aluminium. Also other parts arranged at a high point influencing the centre of gravity should be made of a light material, such that it can be lowered.
  • FIG. 1C is also shown a guide roller 60 for a web 68 (see also FIG. 6 ), as well as moisturizing rollers 62 for applying oil on the cutting members 20 .
  • FIG. 2 shows a second embodiment of the invention, according to which a pair of passive dampers 46 in the form of elongated cylinders 48 are connected to each intermediate piece 32 by retainers 61 . The elongation of the cylinders 48 are in this case across the rotational axis B-B of said anvil.
  • the elongated cylinders 48 are mass dampers 47 .
  • No further passive damper in the form of circular-cylindrical rings is provided.
  • the springs 44 act in cooperation with the pneumatic cylinders 38 .
  • the anvil drum 26 is in its non-cutting, also in this case lifted position.
  • the mass dampers 47 of FIG. 2 could be combined with further passive dampers in the form of elastomeric rings 44 as shown in FIGS. 1A-1C .
  • FIG. 3 shows a third embodiment, according to which passive dampers in the form of elastomeric rings are provided about the springs.
  • the springs are visible, sine the anvil drum 26 is in its non-cutting, also in this case lifted position. No mass damper is provided.
  • FIG. 4 shows the rotary anvil 26 of FIGS. 1A-1C , 2 and 3 with its anvil shaft 24 and anvil sleeves 28 a , 28 b , 28 c (the anvil sleeve 28 a being omitted in the figure for facilitating understanding).
  • the centre of gravity of the rotary cutting apparatus 2 is as low as possible.
  • the anvil shaft has a larger radial extension than that of the opposite ends, where the bearing housings are to be arranged. Consequently, in order to reduce weight of the rotary anvil mounted above the rotary cutter 6 , radial blind holes 64 are provided in the anvil shaft 24 under the anvil sleeves 28 a , 28 c. For the same purpose, a ring-shaped groove 66 is provided underneath the anvil sleeve 28 b , hereby reducing of the diameter of the anvil shaft 24 . It should be noted that the radial blind holes 64 and/or the groove should be large enough to create a substantial weight reduction.
  • centre of gravity may be lowered by choice of material of relatively heavy parts, e.g. of the intermediate part 32 shown in FIGS. 1A-1C and 2 - 3 , to aluminium, carbon fibre or the like, instead of steel.
  • FIG. 5 shows a fourth embodiment, according to which the rotary cutter 6 with knife members 20 is arranged vertically above the rotary anvil 8 .
  • the anvil shaft 24 is connected via the anvil bearing housings 30 to the intermediate piece 32 , which is movably arranged in relation to guide members 36 .
  • the pneumatic cylinders 38 are arranged below the rotary anvil 8 and thus press the anvil drum 26 upwards towards and against the cutter drum 12 to a cutting position.
  • the pneumatic cylinders 38 When the pneumatic cylinders 38 are inactivated, the springs will press the anvil drum 26 downwards to a non-cutting, in this case lowered position (not shown).
  • the extension of the cutter shaft 10 may be reduced such that it does not extend outside one of the cutter bearing housing 14 , the other extension being connected to a not shown power source.
  • the cutter shaft 10 may instead of the anvil shaft 24 be provided with the weight reduction as explained in connection with FIG. 4 , since this will lower the centre of gravity of the rotary cutting apparatus 2 .
  • the intermediate piece 32 should in this case be made of steel, since the low position of it would in itself lower the centre of gravity.
  • FIGS. 6A and 6B show schematically how a web 68 is conveyed via the nip 69 between the cutter drum 12 and the anvil drum 26 , being in a cutting relationship, and how the cut articles are directed in another direction than what is the case for the residue of the web, and depending on which one of the drums is arranged on top of the other.
  • FIG. 7 shows schematically the principle of the mass damper 47 shown in FIGS. 1B and 2 .
  • an elongated circular cylindrical housing 48 is concentrically provided with a rod or a tubing 70 .
  • the housing is 48 connected to the rod or tubing 70 by means of a bushing 72 , preferably made of an elastomeric material, such that disassembly is allowed.
  • a space 74 is defined between the housing and the rod.
  • a damping body 50 made of e.g. plastic, steel or led.
  • the damping body 50 is substantially prevented from moving in an axial direction by the bushings 72 .
  • the damping body 50 is however allowed to move in a radial direction in relation to said rod or tubing 70 inside the housing 48 .
  • the remaining space is filled with a fluid, such as air, water, oil or grease.
  • the mass damper 50 may instead be constituted by a liquid of high density, such as mercury.
  • the damping body may be comprise granules of a suitable material such as led, optionally combined with a fluid (cf. above)
  • the mass damper 47 is possible to tune for different frequency ranges by choosing the length and diameter of the damping body 50 or the number of mass dampers 47 , by choosing material of the damping body and by choosing what kind of gas or liquid is filled in the remaining space inside the housing.
  • FIGS. 6A and 6B A cutting operation as shown in FIGS. 6A and 6B has commenced.
  • Vibrations will be caused due to unbalances in the rotary cutter 6 and/or rotary anvil 8 .
  • the web 68 is in itself relatively uneven as seen in a transverse direction of the web 68 . This is because the contents of the web itself is a a combination of layers of varying thickness of i.a. fibres and super-gel.
  • a vertical movement of the rotary anvil 8 is caused. The larger the vertical movement, the larger the amplitude of the vibration. Due to the varying thickness of the web, continuous vibrations will be created when the web passes the nip 69 .
  • the springs 44 as such will add to the the stiffness of the frame and consequently move the eigenfrequencies to a desired frequency.
  • Continuous vibrations will be possible to reduce by lowering the centre of gravity of the rotary cutting apparatus, e.g. as discussed in connection with FIG. 4 .
  • a foreign body inside or on the web causes the rotary anvil 8 to move vertically away from the cutting relationship with the rotary cutter even more.
  • the anvil drum 26 will be pressed towards the cutter drum 12 by the force of the pneumatic cylinders 38 , possibly causing an impact.
  • the springs 44 will reduce the return force of the impact, but they cannot reduce the vibrations due to the impact. For this reason, the passive dampers 46 as described above are provided.
  • the passive dampers 46 in the form of elastomeric members 52 will instantaneously reduce the force of the impact due to the circular cylindrical shape, and the choice of material will add to the reduction of the vibrations caused by the impact.
  • the elastic members have been shown as shorter than the axial elongation of the springs 44 . They may however be longer than the helical springs.
  • the passive dampers 46 in the form of one or more mass dampers 47 will not be able to reduce the impact as such, but tests have proven that they will very efficiently and quickly reduce the vibrations caused by impacts.
  • the housing 48 of the mass damper 47 may have any suitable shape, the cylinder having a cross-section being e.g. square, rectangular, triangular, polygonal or oval, the damping body 50 being adapted to the selected shape. Furthermore, the housing may have a non-cylindrical shape.
  • the mass damper 47 of FIG. 5 has been shown as being solely of the cylindrical kind arranged parallel to the rotational axis B-B of the anvil drum, it could be replaced by the mass dampers 47 across the rotational axis B-B, as shown in FIG. 2 , be exchanged to the elastometric rings as shown in FIG. 3 or be constituted by a combination of the dampers, depending on the damping requirements.
  • the pneumatic cylinders 38 may instead be hydraulic.
  • the intermediate sleeve 22 shown in FIG. 1A may be constitutes by a further cutter sleeve.
  • the cutter sleeves 18 a , 18 b and the intermediate sleeve 22 may be constituted by a single cutter sleeve.
  • the support rings 17 of the cutter drum 12 are described above as bearing against the support rings 27 of the anvil drum 26 . It should however be noted that the anvil drum 26 may not be provided with support rings 27 at all, such that the support rings 17 of the cutter drum will bear directly against the anvil drum 26 . Likewise, the cutter drum 12 may not be provided with the support rings 17 at all, such that the support rings of the anvil drum will bear directly against the cutter drum 12 .
  • the springs 44 have been shown in the figures as helical springs. It should however be understood that any kind of resilient means having a spring action is meant.
  • the passive damper 46 in the form of four elastomeric members 52 may be made of any suitable damping material and may have any shape, such as a cylinder with a square shape or another polygonal shape.
  • the cylindrical shape may instead have the shape of a cone or a truncated cone or even spherical. It may be solid or hollow, depending on whether it is to be arranged about the spring 44 or beside it. The number is also not restricted to four, but could be two, three, or five or more, depending on the desired properties.
  • the rotary anvil 8 is vertically movable in relation to the frame 4
  • the rotary cutter 6 may instead be vertically movable in relation to the frame.
  • the cutter bearing housings 14 of the cutter shaft 10 will be connected to the intermediate piece 32 , movably arranged at the guide members 36
  • the anvil bearing housings 30 of the anvil shaft 24 will be connected to the frame 4 . This relates to the both the upper (see FIGS. 1A-1C , 2 and 3 ) and the lower arrangement (see FIG. 5 ) of the intermediate piece 32 .
  • the anvil drum may be made in one piece together with the shaft.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US13/431,181 2011-04-08 2012-03-27 Rotary cutting apparatus with vibration attenuation means Active 2033-02-03 US9003939B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1150313 2011-04-08
SE1150313-3 2011-04-08
SE1150313A SE536109C2 (sv) 2011-04-08 2011-04-08 Roterande skärande apparatur med vibrationsdämpningsmedel

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US20150090089A1 (en) * 2013-10-01 2015-04-02 Horizon International Inc. Rotary die cutter
US11292146B2 (en) 2016-07-25 2022-04-05 International Cutting Die, Inc. Cutting apparatus for minimizing deflection of a die cutter assembly
US11618177B1 (en) * 2022-04-12 2023-04-04 Bradley W Boesel Orbital knife

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JP2016055419A (ja) * 2014-09-10 2016-04-21 日本タングステン株式会社 ロータリーダイカッターユニット
ITUB20153933A1 (it) * 2015-09-28 2017-03-28 Cartes S R L Apparato per processare un materiale flessibile.
ES2675850T3 (es) * 2015-10-06 2018-07-13 Sandvik Intellectual Property Ab Aparato de corte rotatorio con una unidad de vigilancia integrada
JP6817705B2 (ja) * 2016-01-28 2021-01-20 株式会社エム・シー・ケー シート加工装置
BR112023017932A2 (pt) * 2021-03-08 2023-12-12 Hyperion Materials & Tech Inc Unidade de corte rotativo

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Publication number Priority date Publication date Assignee Title
US20150090089A1 (en) * 2013-10-01 2015-04-02 Horizon International Inc. Rotary die cutter
US9346182B2 (en) * 2013-10-01 2016-05-24 Horizon International, Inc. Rotary die cutter
US11292146B2 (en) 2016-07-25 2022-04-05 International Cutting Die, Inc. Cutting apparatus for minimizing deflection of a die cutter assembly
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US11618177B1 (en) * 2022-04-12 2023-04-04 Bradley W Boesel Orbital knife
US11648701B1 (en) 2022-04-12 2023-05-16 Bradley W Boesel Orbital knife
US11878438B1 (en) * 2022-04-12 2024-01-23 Bradley W Boesel Orbital knife

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SE1150313A1 (sv) 2012-10-09
ES2675719T3 (es) 2018-07-12
SE536109C2 (sv) 2013-05-07
BR102012008203A2 (pt) 2013-06-11
BR102012008203B1 (pt) 2021-04-20
CN102729285B (zh) 2016-06-15
EP2508312B1 (en) 2018-05-09
US20120255412A1 (en) 2012-10-11
JP2012218148A (ja) 2012-11-12
JP6078867B2 (ja) 2017-02-15
CN102729285A (zh) 2012-10-17
TR201807237T4 (tr) 2018-06-21
EP2508312A1 (en) 2012-10-10

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